外文翻译---浇注系统形式和浇口的设计.docx

英文翻译Gating system design forms and gateA. mainstream design 1. Mainstream Road Size Road end and mainstream is in contact with the nozzle injection machine, and the other end of shunt connected with the taper section of the mobile channel. Road mainstream Xiaoduan size of 3.5 4 mm. 2. Hub in the form of mainstream Road Road entrance to the mainstream Xiaoduan and repeated contact with the nozzle injection machine, is a consumable, more stringent requirements of the material, thus, part of the mainstream mold often designed as a removable sleeve, the replacement of the mainstream form (commonly known as the gate sets, said here Jack Tsui), in order to effectively separate the selection of high-quality steel processing and heat treatment. Jack Tsui are standard parts, just to buy on the line. Common jack Tsui into a jack Aguilar asked not care jack Tsui and two under the former map, a jack Aguilar asked for compatibility positioning circle. Jack Tsui specifications are 12, 16, 20, such as several. As for the injection nozzles a radius of 20, so jack Tsui for R21. 3. Mainstream, the fixed hub Because the use of a child care jack Tsui, using circle with a fixed location in the mold of the panel. Setting circles are also standard parts, the diameter of 120 mm, diameter 35 mm. Specific institutional form as shown below: B. shunt design In multi-cavity or multi-cavity gate (plastic pieces of large size) should be set up triage Road, shunt is the mainstream, with the gate between the end of this section of the plastic melt flow channel. It is pouring in molten state system of plastic into the cavity from the mainstream Road, through the cross-sectional area and the changes in the flow of transformation for the smooth transition of the flow pattern. Therefore, should be designed to divert the pressure to meet a good transfer and maintain the ideal state of filling and in the process of movement of pressure loss as possible, can melt plastic balanced distribution to the various cavity. 1. Main shunt the shape and size Road map is the main streaming (6) in the intake level of under-flow. In order to facilitate the processing and condensate expected Stripping, shunt installed in most of sub-surface, the shunt is generally circular cross section trapezoidal shape of U-shaped semi-circular and rectangular, engineering design often used trapezoidal cross-section processing technology is good, and the plastic melting The loss of heat flow resistance are not large, generally using the following formula to determine their experience section size: Type B-ladder in the bottom edge of the width (mm) m-weight plastic parts (g) L-segregation, the length (mm) H-ladder height (mm) The bevel side of a ladder often take 50-150, in the application of (-1) should pay attention to its scope of application, that is, plastic parts in the thickness of 3.2 mm below the weight of less than 200 g, and the results in the range 3.2-9.5 mm The only reasonable. The electrical insulation for the volume of plastic-3221.7324 mm3, the quality of about 4 g, the length of segregation, is expected to design a 140 mm long, and there are four cavity, so: From B to 8 mm From H to 5 mm Small trapezoidal bottom width from 6 mm, and its side perpendicular to the surface at the direction of about 100 percent. In addition the use of the outlet plate (that is, we are talking about the templates and the middle of the plate with a plate between), the shunt must be made trapezoidal cross-section, for diversion, and mainstream Liu Ning Road Stripping. Actual real-time processing, commonly used cross-section the size of two trapezoidal channel, a large model, a small model. As shown below: 2. Length of the main shunt Shunt to as short as possible, and less bending, injection molding process for the most economic use of raw materials and the injection of energy consumption, reduce the pressure loss and heat loss. Road will be diverted straight into the design, the chief of 140 mm. 3. The design of shunt Road diversion of the main streaming of the two territories, following the flow shape Deputy shunt in the vertical direction of the flow on the taper of the taper for unilateralism, 20, the very bottom diameter of 6 mm, the level of the direction of flow from top to bottom two floors of the diameter of 4 mm, these values are based on experience, the total length of 38.15mm. 4. Shunt the surface roughness As shunt in contact with the outer layer of plastic mold rapid cooling, only the center of the plastic melt flow better, because of segregation, the inner surface roughness Ra does not require very low, generally from about 1.6 m can, This is not just the surface smooth and help melt the plastic outer cortex fixed cooling, and the center of the melt between the poor have a certain speed, to ensure that the melt flow is appropriate when the shear rate and shear heat . Actual processing, milling machines used to flow Milling Road, less for the province to die, saved processing texture on the trip. (Province Die: manufacturing mold a very important process, generally equipped with a professional women die province, with grinding machine, sand paper, Whetstone, such as grinding tools will mold cavity surface polished, Moliang, lower cavity surface roughness Degrees.) 5. Shunt layout form Shunt at the surface of the arrangement and the foregoing cavity are closely related to a variety of different forms of layout, but should follow two principles: that is, on the one hand with tight, narrow plate-size mold the other processes The shortest possible, the clamping force to balance. The flow of the mold form a balanced layout C. Gate Design Gate, also known as the feed mouth, is connected with the cavity of the Road diversion channel, in addition to direct gate, it was pouring system in the cross-section of the smallest part, but it is a key part of gating system, gate location, shape and size Plastic pieces of performance and quality of great. 1. Selection of gate Gate can be divided into restrictive and non-restrictive gate two. We will adopt restrictive gate. On the one hand through the gate of restrictive cross-sectional area of the sudden change to shunt the transmission to produce plastic melt flow rate of acceleration, improve the shear rate, making it ideal state of the movement, full of rapid-balanced cavity, another Improve plastics melt into the cavity when the flow characteristics, adjusting gate size, will enable multi-cavity at the same time is full, can control the filling time, the cooling time and surface quality of plastic parts, also plays a closed cavity to prevent plastic melt Turn the clock back, and to facilitate gate condensate materials and plastic pieces from the role. We use the side gate. Gate also known as the edge of the side gate, the gate abroad as the standard. Side gate open in the general classification level, the plastic melts in the cavity filling-side, the rectangular cross-section shape for more than slit, to adjust its cross-section of the thickness and width adjustment can melt injection at the shear rate and Gate closing time. This lamp gate processing easy, convenient dressing and plastic parts can shape features the flexibility to choose the feed position, so it is a widely used form of a gate, the widespread use of plastic parts in small and medium-sized multi-cavity mold, And the adaptability of various plastic molding are strong, but there are traces of the gate, a weld marks, Shrinkage, stomatal defects, such as plastic parts, injection and pressure loss, the deep cavity plastic parts exhaust inconvenience. The specific to mold, form and size of its gate gate sizes are from all parts of the experience of value. 2. Gate location of choice Die design, location and size of gate of the more stringent requirements, a preliminary test mode after the gate size needed further changes, no matter what the gate, opened its location on the plastic parts molding great impact on the quality and performance, pouring a reasonable choice I opened the location is an important link in improving quality, the location of different gate at the same time also affected die structure. In short to make plastic parts with a good performance and appearance, we must seriously consider the choice of gate position, usually to consider the following principles: 1) minimize the flow of distance. 2) gate should be opened in the maximum wall thickness plastic parts. 3) the need to minimize the weld marks. 4) should help in gas from the cavity. 5) consideration of directional influence. 6) avoid jet and wiggle. 7) the gate to avoid bending and the impact load. 8) attention to the appearance of quality. According to the characteristics of plastic parts, considering more than a few principles, pouring into a triage point, a bit on the line, Point 2 pouring into the shunt open in the post-die-on. D. pouring system of balance For small and medium-sized pieces of plastic injection molds have been widely used mode of a multi-cavity in the form of design should try to ensure that all the cavity at the same time be uniform filling and forming. Usually in the shape of plastic parts and die structure to allow the circumstances, should be from the mainstream of the cavity, to shunt the growth of the same design, shape and size of the same section (cavity layout for the balance) in the form of, otherwise we will need Size of the gate to regulate the flow gate and molding process to achieve consensus, which is pouring system balance. Obviously, we design the mold is balanced, that is, from the mainstream, to shunt the cavity of the same length, shape and size are the same section. E. cold material point of the design Upon completion of a cycle of injection interval, taking into account the injection nozzles of the mainstream entrance and a small section of this melt due to heat and radiation below the required temperature of the plastic melt from the nozzle end of the injection machine to within about 10 Liaotong - 25mm depth has a temperature gradually increased the region, at this time to reach normal temperatures melt the plastic. In this region of the flow of plastic molding and poor performance, if this relatively low temperature of cold material into the cavity, there will be defective. In order to overcome the impact of this phenomenon, with a well Point Road extension will be the mainstream expected to receive cold, cold material to prevent pouring into the system and the flow cavity, the injection of this interval to accommodate the cold material generated by the Well Points Cold material known as the Point. Cold Point generally expected in the mainstream Road opposite the creation of the dynamic template (that is, to the flow of plastic), the nominal diameter and its mainstream Road Taiduan diameter of the same or slightly larger number, depth of about 1-1.5 times the diameter of the end Cold expected to ensure that the green is smaller than the size of expected cold, cold material points in six forms, is commonly used for the end of the Z-shaped and Rafah in the form of materials, according to the specific properties of plastic reasonable choice. In fact, as long as the streaming-will extend to some distance on the line.译文浇注系统形式和浇口的设计A. 主流道设计1. 主流道尺寸主流道是一端与注射机喷嘴相接触，另一端与分流道相连的一段带有锥度的流动通道。主流道小端尺寸为3.54mm。2. 主流道衬套的形式主流道小端入口处与注射机喷嘴反复接触，属易损件，对材料要求较严，因而模具主流道部分常设计成可拆卸更换的主流道衬套形式（俗称浇口套，这边称唧咀），以便有效的选用优质钢材单独进行加工和热处理。唧咀都是标准件，只需去买就行了。常用唧咀分为有托唧咀和无托唧咀两种下图为前者，有托唧咀用于配装定位圈。唧咀的规格有12，16，20等几种。由于注射机的喷嘴半径为20，所以唧咀的为R21。 3. 主流道衬套的固定因为采用的有托唧咀，所以用定位圈配合固定在模具的面板上。定位圈也是标准件，外径为120mm，内径35mm。具体固定形式如下图所示： B. 分流道设计在多型腔或单型腔多浇口（塑件尺寸大）时应设置分流道，分流道是指主流道末端与浇口之间这一段塑料熔体的流动通道。它是浇注系统中熔融状态的塑料由主流道流入型腔前，通过截面积的变化及流向变换以获得平稳流态的过渡段。因此分流道设计应满足良好的压力传递和保持理想的充填状态，并在流动过程中压力损失尽可能小，能将塑料熔体均衡地分配到各个型腔。1. 主分流道的形状及尺寸主分流道是水口板下水平的流道。为了便于加工及凝料脱模，分流道大多设置在分型面上，分流道截面形状一般为圆形梯形U形半圆形及矩形等，工程设计中常采用梯形截面加工工艺性好，且塑料熔体的热量散失流动阻力均不大，一般采用经验公式可确定其截面尺寸：式中 B梯形大底边的宽度（mm） m塑件的重量（g） L分流道的长度（mm） H梯形的高度（mm）梯形的侧面斜角a常取50150，在应用式（式1）时应注意它的适用范围，即塑件厚度在3.2mm以下，重量小于200g，且计算结果在3.29.5mm范围内才合理。本电动机绝缘胶架的体积为3221.7324mm3，质量大约4g，分流道的长度预计设计成140mm长，且有4个型腔，所以： 取B为8mm 取H为5mm梯形小底边宽度取6mm，其侧边与垂直于分型面的方向约成100。另外由于使用了水口板（即我们所说的定模板和中间板之间再加的一块板），分流道必须做成梯形截面，便于分流道和主流道凝料脱模。实际加工时实，常用两种截面尺寸的梯形流道，一种大型号，一各小型号。如下图所示： 2. 主分流道长度分流道要尽可能短，且少弯折，便于注射成型过程中最经济地使用原料和注射机的能耗，减少压力损失和热量损失。将分流道设计成直的，总长140mm。3. 副分流道的设计副分流道的主分流道以下的两个土字形的流道副分流道中竖直方向上有锥度的流道的锥度为单边20，其最底部直径为6mm，水平方向上下两层流道的直径为4mm，这些都是根据经验取值，其总长度为38.15mm。4. 分流道的表面粗糙度由于分流道中与模具接触的外层塑料迅速冷却，只有中心部位的塑料熔体的流动状态较为理想，因面分流道的内表面粗糙度Ra并不要求很低，一般取1.6m左右既可，这样表面稍不光滑，有助于塑料熔体的外层冷却皮层固定，从而与中心部位的熔体之间产生一定的速度差，以保证熔体流动时具有适宜的剪切速率和剪切热。实际加工时，用铣床铣出流道后，少为省一下模，省掉加工纹理就行了。（省模：制造模具的一道很重要的工序，一般配备了专业的省模女工，即用打磨机，沙纸，油石等打磨工具将模具型腔表面磨光，磨亮，降低型腔表面粗糙度。）5. 分流道的布置形式分流道在分型面上的布置与前面所述型腔排列密切相关，有多种不同的布置形式，但应遵循两方面原则：即一方面排列紧凑、缩小模具板面尺寸；另一方面流程尽量短、锁模力力求平衡。本模具的流道布置形式采用平衡式 C. 浇口的设计浇口亦称进料口，是连接分流道与型腔的通道，除直接浇口外，它是浇注系统中截面最小的部分，但却是